When you invest in a solar hot water system, you're making a smart choice for your Australian home. But what happens on cloudy days or during winter when the sun isn't quite strong enough? That's where backup heating comes in. The two main options available to homeowners are gas backup and electric boost systems, and each has its own advantages and considerations.
Understanding the differences between these two approaches will help you make an informed decision that aligns with your household needs, energy preferences, and budget.
What Are Gas Backup and Electric Boost Systems?
A gas backup system uses natural gas or LPG to heat your water when solar energy alone isn't sufficient. When your solar panels aren't generating enough energy, a gas burner automatically kicks in to top up your water temperature.
An electric boost system, on the other hand, uses an electric element to heat your water on low sunlight days. Your solar system continues to do the heavy lifting, but when additional heating is needed, electricity from the grid supplements the solar energy.
Both systems are designed to ensure you have hot water available 24/7, regardless of weather conditions or the time of year.
Operating Costs: Gas vs Electric
The running costs of each system depend largely on the energy prices in your area. In many parts of Australia, natural gas can be cheaper per unit of energy than electricity, which might suggest gas backup is the more economical choice. However, this isn't always straightforward.
Electric boost systems tend to be more efficient because they lose less heat during the heating process. Gas systems require venting, which means some heat escapes up the flue. If you combine your electric boost with a solar system that generates most of your hot water, you may find you're using the backup less frequently, which could keep your energy bills down.
At Solahart Shoalhaven, our team can help you analyse local energy prices and estimate how often each type of backup would actually activate in your home, giving you a clearer picture of potential costs.
Installation and Equipment Costs
Upfront costs vary between the two options. Electric boost systems are generally simpler to install because they don't require gas connections or special venting. If your home already has a gas line, a gas backup system might not cost significantly more to install. However, if gas infrastructure doesn't exist at your property, installation becomes considerably more expensive.
The equipment itself also differs in price. Electric elements are typically less expensive than gas heating components, but this is just one part of the overall investment. You'll want to factor in any necessary plumbing, electrical work, or structural changes required at your specific property.
Contact Solahart Shoalhaven to discuss the installation requirements and costs for your home.
Efficiency and Environmental Considerations
Electric boost systems paired with solar hot water are highly efficient because solar energy is doing most of the work. You're only using grid electricity sparingly, and if you have rooftop solar panels generating excess power, you might even use that to power your boost element.
Gas systems, while potentially cheaper to run in some regions, do produce greenhouse gas emissions. For Australian homeowners interested in reducing their environmental footprint, an electric boost system paired with solar offers a more sustainable path forward, especially if your electricity comes from renewable sources.
Both approaches are cleaner than traditional electric-only hot water systems, and both work beautifully alongside modern solar technology.
Maintenance and Reliability
Electric boost elements are straightforward to maintain. There are fewer moving parts, and they typically last many years without issues. When they do need replacement, the process is usually quick and affordable.
Gas systems require more regular servicing to ensure safe operation and maintain efficiency. Gas burners need periodic inspection, and there's a higher level of complexity involved in the system overall. This can mean slightly higher maintenance costs over the system's lifetime.
Both types of systems are reliable when properly installed and maintained, but the simplicity of electric boost does offer some practical advantages for busy homeowners.
Making Your Decision
Choosing between gas backup and electric boost depends on several factors specific to your home and circumstances. Consider the availability of gas at your property, current energy prices in your area, how much you value simplicity and lower maintenance, and your environmental priorities.
Your climate zone matters too. In regions with more consistent sunshine, you'll use your backup less frequently regardless of type. In cloudier areas, the backup runs more often, which impacts long-term costs.
The best approach is to get personalised advice based on your actual household usage patterns and local conditions. The team at Solahart Shoalhaven can assess your situation and provide recommendations tailored to your home.
Get Expert Guidance for Your Home
Both gas and electric backup options have merit, and the right choice depends entirely on your specific circumstances. Rather than guessing which system offers better value, it makes sense to consult with professionals who understand your local energy landscape and can run the numbers for you.
Ready to explore your hot water options? Contact Solahart Shoalhaven today for a free quote and personalised consultation. Our team will help you understand exactly which backup solution makes the most sense for your home and budget.
Energy savings vary depending on household usage and location.
